On Tue, May 27, 2014 at 5:17 PM, Benedikt Huber <benedikt.hu...@theobroma-systems.com> wrote: > > On 27 May 2014, at 17:09, Richard Biener <richard.guent...@gmail.com> wrote: > >> On Tue, May 27, 2014 at 5:03 PM, Benedikt Huber >> <benedikt.hu...@theobroma-systems.com> wrote: >>> (Sorry for the duplicate.) >>> >>> I managed to pass the needed parameters to the generated function. >>> However I cannot pin down the reason why the compilation fails. >>> It seems that the cfg is somehow broken, but I cannot tell how. >>> Do you have any debugging hints? >>> >>> As far as I can tell, the cfg is changed during the generation of the >>> preheader >>> (I do this to find the entry block easily.) >>> and in the function move_sese_region_to_fn. >>> >>> I noticed that after pass 058t.copyrename2 the original function bar >>> disappears >>> and the new function is replaced by _GLOBAL__N_bar.constprop, could this >>> have >>> anything to do with the problem? >> >> Unlikely. You can disable that by using -fno-ipa-cp. >> >>> The pass runs just after the construction of cfg, outline.c.011t.cfg. >>> >>> /home/bhuber/sandbox/install/bin/gcc -O3 -I /home/bhuber/sandbox/src -c >>> -fdump-tree-all-details -fdump-ipa-all-details -fdump-rtl-all-details >>> -funinline-innermost-loops -Wall -Wextra /home/bhuber/sandbox/try/outline.c >>> /home/bhuber/sandbox/try/outline.c: In function '_GLOBAL__N_bar.constprop': >>> /home/bhuber/sandbox/try/outline.c:3:1: internal compiler error: in >>> purge_dead_edges, at cfgrtl.c:3183 >> >> the line doesn't match anything that would ICE on current trunk, but I >> suppose >> it's the single_succ_p assert that triggers? > Yes, that is right, it is > > gcc_assert (single_succ_p (bb)); > >> >> Either you really got until RTL generation or somehow cfgrtl cfg hooks are >> still active while you are working in your pass. > > The pass that fails, according to the dump files is outline.c.174r.expand > So it already tries to generate RTL. > My problem is that there are so many passes in > between, that I do not know where to start looking. > Any idea?
What code-base are you developing on? Do you build with checking enabled (--enable-checking, the default on trunk but not on release branches). Richard. >> >> Richard. >> >>> bar (int s, int r, unsigned * t, int * k, int * p, int * l) >>> ^ >>> 0x67e7c4 purge_dead_edges(basic_block_def*) >>> ../../src/gcc/cfgrtl.c:3183 >>> 0xe5a0d6 find_bb_boundaries >>> ../../src/gcc/cfgbuild.c:522 >>> 0xe5a0d6 find_many_sub_basic_blocks(simple_bitmap_def*) >>> ../../src/gcc/cfgbuild.c:604 >>> 0x66c0f5 execute >>> ../../src/gcc/cfgexpand.c:5873 >>> Please submit a full bug report, >>> with preprocessed source if appropriate. >>> Please include the complete backtrace with any bug report. >>> See <http://gcc.gnu.org/bugs.html> for instructions. >>> >>> I attach the transformation pass and the small example program. >>> >>> Thank you again for the help, >>> Benedikt >>> >>> P.s. I am aware that this transformation is not safe in general, >>> however in this case it should work. >
